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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.gameperformance;
import android.annotation.MainThread;
import android.annotation.NonNull;
import android.annotation.WorkerThread;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.AnimationDrawable;
import android.view.WindowManager;
import android.widget.AbsoluteLayout;
import android.widget.ImageView;
import android.window.WindowMetricsHelper;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
/**
* View that holds requested number of UI controls as ImageView with an infinite animation.
*/
public class CustomControlView extends AbsoluteLayout {
private final static int CONTROL_DIMENSION = 48;
private final int mPerRowControlCount;
private List<Long> mFrameTimes = new ArrayList<>();
public CustomControlView(@NonNull Context context) {
super(context);
final WindowManager wm = context.getSystemService(WindowManager.class);
final int width = WindowMetricsHelper.getBoundsExcludingNavigationBarAndCutout(
wm.getCurrentWindowMetrics()).width();
mPerRowControlCount = width / CONTROL_DIMENSION;
}
/**
* Helper class that overrides ImageView and observes draw requests. Only
* one such control is created which is the first control in the view.
*/
class ReferenceImageView extends ImageView {
public ReferenceImageView(Context context) {
super(context);
}
@Override
public void draw(Canvas canvas) {
reportFrame();
super.draw(canvas);
}
}
@WorkerThread
public void createControls(
@NonNull Activity activity, int controlCount) throws InterruptedException {
synchronized (this) {
final CountDownLatch latch = new CountDownLatch(1);
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
removeAllViews();
for (int i = 0; i < controlCount; ++i) {
final ImageView image = (i == 0) ?
new ReferenceImageView(activity) : new ImageView(activity);
final int x = (i % mPerRowControlCount) * CONTROL_DIMENSION;
final int y = (i / mPerRowControlCount) * CONTROL_DIMENSION;
final AbsoluteLayout.LayoutParams layoutParams =
new AbsoluteLayout.LayoutParams(
CONTROL_DIMENSION, CONTROL_DIMENSION, x, y);
image.setLayoutParams(layoutParams);
image.setBackgroundResource(R.drawable.animation);
final AnimationDrawable animation =
(AnimationDrawable)image.getBackground();
animation.start();
addView(image);
}
latch.countDown();
}
});
latch.await();
}
}
@MainThread
private void reportFrame() {
final long time = System.currentTimeMillis();
synchronized (mFrameTimes) {
mFrameTimes.add(time);
}
}
/**
* Resets frame times in order to calculate FPS for the different test pass.
*/
public void resetFrameTimes() {
synchronized (mFrameTimes) {
mFrameTimes.clear();
}
}
/**
* Returns current FPS based on collected frame times.
*/
public double getFps() {
synchronized (mFrameTimes) {
if (mFrameTimes.size() < 2) {
return 0.0f;
}
return 1000.0 * mFrameTimes.size() /
(mFrameTimes.get(mFrameTimes.size() - 1) - mFrameTimes.get(0));
}
}
}
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